Biostratigraphy of Oligocene and lower Miocene strata along a transect Well

In order to biostratighraphy and to discover relationships between biozones of the Oligocene and lower Miocene strata in Zagros foreland basin, Zagros simply folded belt and High Zagros area, 10 stratigraphic sections along a transect well "A" in Persian Gulf to Semirum section in High Zagros were investigated. The study of more than 1500 thin sections resulted in identification of 32 genera and 54 species of benthonic foraminifera belonging to nine genera and 15 species of planktonic foraminifera. The recorded assemblages led to establishment of six biozones ranging in age Oligocene to Early Miocene. Biostratighraphic correlation yielded clarification of relationship between biozones and sedimentary trends and discontinuities of the Oligocene and lower Miocene in Zagros basin in the areas.